Question on Battery model #'s?

[Robert Nicholson]

I have an 800 mhz Titanium ... Is there anybody else with this machine  
that has

M8511 for their battery model #?

Why is it none of these numbers match the list at

http://docs.info.apple.com/ 
article.html?artnum=16168&SaveKCWindowURL=http%3A%2F%2Fkbase.info.apple. 
com%2Fcgi- 
bin%2FWebObjects%2Fkbase.woa%2Fwa%2FSaveKCToHomePage&searchMode=Assisted 
&kbhost=kbase.info.apple.com&showButton=false&randomValue=100&showSurvey 
=false&sessionID=anonymous|160579022